package initramfs-tools 0.130ubuntu3.1 failed to install/upgrade: installed initramfs-tools package post-installation script subprocess returned error exit status 1

[Yaroslav]

after trying to update packages (just after a fresh ubuntu 18.04 persistent install on usb 8GB) i got this error

ProblemType: Package
DistroRelease: Ubuntu 18.04
Package: initramfs-tools 0.130ubuntu3.1

ProblemType: Package
DistroRelease: Ubuntu 18.04
Package: initramfs-tools 0.130ubuntu3.1
ProcVersionSignature: Ubuntu 4.4.0-128.154-generic 4.4.131
Uname: Linux 4.4.0-128-generic x86_64
ApportVersion: 2.20.9-0ubuntu7.2
Architecture: amd64
Date: Mon Jul 23 10:19:25 2018
ErrorMessage: installed initramfs-tools package post-installation script subprocess returned error exit status 1
InstallationDate: Installed on 2018-04-24 (89 days ago)
InstallationMedia: Ubuntu-Server 16.04.3 LTS "Xenial Xerus" - Release amd64 (20170801)
PackageArchitecture: all
Python3Details: /usr/bin/python3.6, Python 3.6.5, python3-minimal, 3.6.5-3ubuntu1
PythonDetails: /usr/bin/python2.7, Python 2.7.15rc1, python-minimal, 2.7.15~rc1-1
RelatedPackageVersions:
 dpkg 1.19.0.5ubuntu2
 apt 1.6.3
SourcePackage: initramfs-tools
Title: package initramfs-tools 0.130ubuntu3.1 failed to install/upgrade: installed initramfs-tools package post-installation script subprocess returned error exit status 1
UpgradeStatus: Upgraded to bionic on 2018-06-22 (30 days ago)

[Timo Aaltonen (tjaalton)]

Processing triggers for initramfs-tools (0.130ubuntu3.1) ...
update-initramfs: Generating /boot/initrd.img-4.4.0-128-generic
touch: невозможно выполнить touch для '/boot/initrd.img-4.4.0-128-generic.new': Неизвестная ошибка 4094
/usr/sbin/mkinitramfs: 382: /usr/sbin/mkinitramfs: cannot create : Directory nonexistent
rm: невозможно удалить '/boot/initrd.img-4.4.0-128-generic.new': Неизвестная ошибка 4094
dpkg: error processing package initramfs-tools (--configure):
 installed initramfs-tools package post-installation script subprocess returned error exit status 1